{"id":456,"date":"2019-12-01T04:02:23","date_gmt":"2019-11-30T19:02:23","guid":{"rendered":"http:\/\/ipwn.kr\/?p=456"},"modified":"2020-03-14T05:24:30","modified_gmt":"2020-03-13T20:24:30","slug":"binary-negative","status":"publish","type":"post","link":"http:\/\/ipwn.kr\/index.php\/2019\/12\/01\/binary-negative\/","title":{"rendered":"2\uc9c4\uc218 \uc22b\uc790\uccb4\uacc4 \uc74c\uc218 \ud45c\ud604"},"content":{"rendered":"<p>\uc6b0\ub9ac\uac00 \uc0ac\uc6a9\ud558\ub294 \ucef4\ud4e8\ud130\ub294 \uc22b\uc790\ub97c 2\uc9c4\uc218 \uccb4\uacc4\ub85c \ud45c\ud604\ud569\ub2c8\ub2e4.<\/p>\n<p>\uadf8 \uc911\uc5d0\uc11c \uc74c\uc218\ub97c \ud45c\ud604\ud560 \ub54c\uc5d0\ub294 \ub9e8 \uccab bit\ub97c \uc0ac\uc6a9\ud558\uc5ec \uac80\uc0ac\ud558\ub294\ub370 \ub9e8 \uccab bit\uac00 0\uc774\ub77c\uba74 \uc591\uc218, 1\uc774\ub77c\uba74 \uc74c\uc218\ub85c \ucc98\ub9ac\ud569\ub2c8\ub2e4.<\/p>\n<p>1byte\uc758 \ud06c\uae30\uc5d0\uc11c \uc608\uc2dc\ub97c \ub4e4\uc5b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>\n<p><code>ex 1) 1 = 0000 0001<\/code><br \/>\n<code>ex 2) -1 = 1111 1111<\/code><\/p>\n<p>\uadf8\ub7f0\ub370 -1\uc774 \uc65c <code>1111 1111<\/code>\ub77c\ub294 bit\uac12\uc744 \uac00\uc9c8\uae4c\uc694?<\/p>\n<p>\uadf8 \uc774\uc720\ub294 \uc5b4\ub5a4 \ud55c \uc591\uc758 \uc815\uc218\uc5d0 -1\uc744 \uacf1\ud55c \uc74c\uc758 \uc815\uc218\uac12\uc740 \uc6d0\ub798 \uac12\uc758 <code>\ubcf4\uc218<\/code>\uc774\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4.<\/p>\n<p>\uc5ed\uc73c\ub85c \uc0dd\uac01\ud558\uba74 \uc5b4\ub5a4 \ud55c \uc74c\uc758 \uc815\uc218\uac12\uc5d0 -1\uc744 \uacf1\ud55c \uc591\uc758 \uc815\uc218\uac12\ub3c4 \ub9c8\ucc2c\uac00\uc9c0\ub85c \uc6d0\ub798 \uac12\uc758 <code>\ubcf4\uc218<\/code>\uc785\ub2c8\ub2e4.<\/p>\n<p>(\ubcf4\uc218\ub97c \uad6c\ud558\ub294 \ubc95\uc740 \uc5b4\ub5a4 \ud55c \uac12 <code>N<\/code>\uc758 \ubaa8\ub4e0 <code>bit<\/code>\ub97c 0\uc740 1\ub85c 1\uc740 0\uc73c\ub85c \ubc14\uafd4\uc900 \ud6c4, +1\uc744 \uc9c4\ud589\ud574\uc8fc\uba74 \ub429\ub2c8\ub2e4.)<\/p>\n<p>\uadf8\ub7f0\ub370 \uc5ec\uae30\uc11c \uce58\uba85\uc801\uc778 \uc624\ub958\uac00 \ud558\ub098 \ubc1c\uc0dd\ud569\ub2c8\ub2e4.<\/p>\n<p>1byte (8bit)\uc758 \ud06c\uae30\ub97c \uac00\uc9c4 \uc5b4\ub5a4 \uc815\uc218 N\uc774 \uc874\uc7ac\ud55c\ub2e4\uace0 \uac00\uc815\ud569\uc2dc\ub2e4.<\/p>\n<p>N\uc774 \uc77c\ubc18\uc801\uc778 \uc5b4\ub5a4 \ub2e4\ub978 \uac12\uc744 \uac00\uc9c0\uace0 \uc788\ub2e4\uba74 \uc0c1\uad00\uc774 \uc5c6\uaca0\uc9c0\ub9cc, N\uc774 \ub9cc\uc77c <code>-128<\/code> \uadf8\ub7ec\ub2c8\uae4c bit\uac12\uc73c\ub85c\ub294 <code>1000 0000<\/code>\uc774\ub77c\ub294 \uac12\uc744 \uac16\uace0\uc788\ub2e4\uba74 \uc5b4\ub5bb\uac8c \ub420\uae4c\uc694?<\/p>\n<p>\uc704\uc758 N\uc774\ub77c\ub294 \uac12\uc744 \uc808\ub300\uac12\uc744 \ub9cc\ub4e4\uc5b4\ubcf8\ub2e4\uace0 \uc0dd\uac01\ud574\ubd05\uc2dc\ub2e4.<\/p>\n<p>\uadf8\ub7fc \uc790\uc5f0\uc2a4\ub808 N\uc758 \ubaa8\ub4e0 bit\ub294 \ubc18\uc804\uc774 \ub41c \ud6c4 +1\uc774 \ub420 \uac83\uc785\ub2c8\ub2e4.<\/p>\n<p><code>1000 0000<\/code> ->(\ubc18\uc804) <code>0111 1111<\/code> ->(+1) <code>1000 0000<\/code> \uc5e5 \ub180\ub78d\uac8c\ub3c4 \ub2e4\uc2dc \uc6d0\ub798\uc758 \uac12\uc778 <code>-128<\/code>\ub85c \ub3cc\uc544\uc624\uac8c \ub418\uc5c8\uc2b5\ub2c8\ub2e4.<\/p>\n<p><code>\uc9dc\uc794~~<\/code><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\uc6b0\ub9ac\uac00 \uc0ac\uc6a9\ud558\ub294 \ucef4\ud4e8\ud130\ub294 \uc22b\uc790\ub97c 2\uc9c4\uc218 \uccb4\uacc4\ub85c \ud45c\ud604\ud569\ub2c8\ub2e4. \uadf8 \uc911\uc5d0\uc11c \uc74c\uc218\ub97c \ud45c\ud604\ud560 \ub54c\uc5d0\ub294 \ub9e8 \uccab bit\ub97c \uc0ac\uc6a9\ud558\uc5ec \uac80\uc0ac\ud558\ub294\ub370 \ub9e8 \uccab bit\uac00 0\uc774\ub77c\uba74 \uc591\uc218, 1\uc774\ub77c\uba74 \uc74c\uc218\ub85c \ucc98\ub9ac\ud569\ub2c8\ub2e4. 1byte\uc758 \ud06c\uae30\uc5d0\uc11c \uc608\uc2dc\ub97c \ub4e4\uc5b4\ubcf4\uaca0\uc2b5\ub2c8\ub2e4. ex 1) 1 = 0000 0001 ex 2) -1 = 1111 1111 \uadf8\ub7f0\ub370 -1\uc774 \uc65c 1111 1111\ub77c\ub294 bit\uac12\uc744 \uac00\uc9c8\uae4c\uc694? \uadf8 \uc774\uc720\ub294 \uc5b4\ub5a4 \ud55c \uc591\uc758 \uc815\uc218\uc5d0 -1\uc744&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-456","post","type-post","status-publish","format-standard","hentry","category-etc"],"_links":{"self":[{"href":"http:\/\/ipwn.kr\/index.php\/wp-json\/wp\/v2\/posts\/456"}],"collection":[{"href":"http:\/\/ipwn.kr\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/ipwn.kr\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/ipwn.kr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/ipwn.kr\/index.php\/wp-json\/wp\/v2\/comments?post=456"}],"version-history":[{"count":4,"href":"http:\/\/ipwn.kr\/index.php\/wp-json\/wp\/v2\/posts\/456\/revisions"}],"predecessor-version":[{"id":891,"href":"http:\/\/ipwn.kr\/index.php\/wp-json\/wp\/v2\/posts\/456\/revisions\/891"}],"wp:attachment":[{"href":"http:\/\/ipwn.kr\/index.php\/wp-json\/wp\/v2\/media?parent=456"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/ipwn.kr\/index.php\/wp-json\/wp\/v2\/categories?post=456"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/ipwn.kr\/index.php\/wp-json\/wp\/v2\/tags?post=456"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}